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Fluctuation of Plasmonically Induced Transparency Peaks within Multi-Rectangle Resonators
Ruoyu Pei1, Dongdong Liu1,2,3, Qun Zhang3
1Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, College of Physical Science and Technology, Yili Normal University, Yining 835000, China.
Sensors (Basel, Switzerland)
|January 8, 2023
Summary
Researchers explored plasmonically induced transparency (PIT) in waveguide-coupled resonators. Modifying parameters enabled tunable PIT responses and peak fluctuations, showing potential for advanced sensing applications.
Area of Science:
- Plasmonics
- Optical metamaterials
- Nanophotonics
Background:
- Plasmonically induced transparency (PIT) is a crucial phenomenon with applications in sensing, slow light, and nonlinear optics.
- Understanding PIT in complex resonator structures is key for advancing optical communication systems.
Purpose of the Study:
- To numerically investigate the plasmonically induced transparency (PIT) effect in metal-insulator-metal waveguides coupled to asymmetric three-rectangle resonators.
- To analyze the properties, effects, and performance of PIT peaks by examining their fluctuations.
Main Methods:
- Numerical simulations were performed on a metal-insulator-metal waveguide coupled to asymmetric three-rectangle resonators.
- Geometric parameters and filling dielectrics were modified to tune the PIT optical response and observe peak fluctuations.
- Finite element simulations were used to validate the findings.
Main Results:
- Two distinct PIT peaks were observed, with one decreasing and the other increasing.
- The study successfully realized an off-to-on PIT optical response, achievable with single or double peaks.
- Peak fluctuations were successfully obtained by altering structural and material properties.
Conclusions:
- The numerical investigations provide a deeper understanding of PIT effects in multi-rectangle resonator systems.
- The tunable nature of the PIT response and observed peak fluctuations highlight the potential of these structures for sensing applications.
- The findings are consistent with finite element simulations, confirming the proposed structures' viability.
